Method for controlling combustion engine with combustion chamber, involves overflowing air mass from air intake system into waste gas system during valve overlap of gas shuttle valves

摘要

The method involves overflowing an air mass (mL-abg) from the air intake system (20) into the waste gas system (22) during a valve overlap of the gas shuttle valves (16,18) by controlling interferences on a variable control. The extent of the enrichment of the combustion chamber-fuel/air mixture is examined for detecting an overheating risk in the catalyzer (52). A measure is captured which limits the free amount of heat liberated by an exothermic reactions in catalyzer. An independent claim is also included for a control device of a combustion engine.